Configuring a CT3 interface in CT3 mode
When you change the interface state during the configuration, make sure you understand the following information:
Shutting down or bringing up a CT3 interface also shuts down or brings up all its lines and serial interfaces, including:
T1 lines demultiplexed from the CT3 interface.
Serial interfaces created for unframed T1 lines.
The serial interfaces created for channel sets on framed T1 lines.
Shutting down or bringing up a T1 line also shuts down or brings up the serial interface created for it.
To shut down or bring up only the serial interface for a T3, unframed T1, or framed T1 channel, use the shutdown or undo shutdown command in serial interface view.
To configure a CT3 interface in CT3 mode:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter CT3 interface view. | controller t3 interface-number | N/A |
3. Configure the interface to operate in CT3 mode. | using ct3 | The default operating mode is CT3 mode. |
4. Set the operating mode of a T1 line on the CT3 interface. |
| By default:
|
5. (Optional.) Configure the interface description. | description text | By default, the description of an interface is interface-name Interface. |
6. (Optional.) Set the clock mode. |
| The default clock mode for the CT3 interface is slave. The default clock mode for the T1 line is slave. |
7. Set the cable length. | cable feet | The default is 14.9 meters (49 feet). |
8. Set the framing format for the CT3 interface. | frame-format { c-bit | m23 } | By default, the framing format on the CT3 interface is C-bit. |
9. Set the framing format for the T1 line. | t1 line-number set frame-format { esf | sf } | By default, the framing format on the T1 line is ESF. |
10. (Optional.) Set the loopback mode. |
| By default, loopback is disabled. |
11. (Optional.) Configure alarm signal detection/sending. |
| By default, alarm signal detection is enabled and alarm signal sending is disabled. |
12. (Optional.) Configure FEAC channel signal detection/sending on the CT3 interface. |
| By default, FEAC channel signal detection is enabled, but no FEAC signals are sent. |
13. (Optional.) Configure MDL message detection/sending on the CT3 interface. | mdl { data { eic string | fic string | | gen-no string | lic string | pfi string | port-no string | unit string } | detect | generate { idle-signal | path | test-signal } } | By default, MDL message detection and sending are disabled and the default MDL message information applies. |
14. (Optional.) Place a T1 line on the far-end CT3 interface in a loopback. | t1 line-number sendloopcode { fdl-ansi-line-up | fdl-ansi-payload-up | fdl-att-payload-up | inband-line-up } | By default, no loopback mode is set. |
15. (Optional.) Set the FDL format for a T1 channel. | t1 line-number set fdl { ansi | att | both | none } | By default, FDL is disabled. This operation applies only to T1 channels that are formed on CT3 interfaces, operate in channelized mode, and use ESF as the T1 framing format. |
16. (Optional.) Restore the default settings for the CT3 interface. | default | N/A |
17. (Optional.) Bring up the CT3 interface or a T1 line on the interface. |
| By default, all CT3 interfaces and T1 lines are up. |
18. Return to system view. | quit | N/A |
19. Enter synchronous serial interface view. |
| Make sure the synchronous serial interface is the one created for the T1 line you want to configure. |
20. Set the CRC mode. | crc { 16 | 32 | none } | The default is 16-bit CRC. |